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V118C

Phase 1

Pneumococcal Infection | Monoclonal antibody | Infectious Disease |Merck & Company, Inc.|Trials Updated: Oct 2, 2026

V118C development status

Highest phase Phase 1
Registered trials 1 across 1 sponsor since Sep 2024

Success Probability

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Market & Valuation

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Trial Design

RandomizedDouble-BlindACTIVE_CONTROLLEDDMC
Total Trials1
Total Enrollment210

FDA Designations

No designations recorded

V118C clinical trials

V118C · 1 trial · 1 indication

Phase 1 1
NCT07300267A Clinical Study of Novel Pneumococcal Vaccine V118C in Children (V118C-002)Pneumococcal Infection
RECRUITING210 Analytics
PHASE1RECRUITING
A Clinical Study of Novel Pneumococcal Vaccine V118C in Children (V118C-002)
Pneumococcal InfectionUnlock trial analytics

Study Endpoints

Primary Endpoints

Stage 1: Percentage of Participants With Immediate Adverse Events (AEs) Following Vaccination
Up to approximately 30 minutes postvaccination

An AE is any untoward medical occurrence in a patient or clinical study participant, temporally associated with the use of study intervention, whether or not considered related to the study intervention. Percentage of participants with immediate AEs following vaccination will be reported.

Stage 1: Percentage of Participants With Solicited Injection-Site Adverse Events (AEs)
Up to approximately 7 days postvaccination

An AE is any untoward medical occurrence in a patient or clinical study participant, temporally associated with the use of study intervention, whether or not considered related to the study intervention. A solicited AE is a predefined event that participants legally acceptable representative (LAR) are specifically asked about and record on their electronic vaccine report card (eVRC). Solicited injection-site AEs include redness, swelling, pain or tenderness and hard lump. Percentage of participants with solicited injection-site AEs will be reported.

Stage 1: Percentage of Participants With Solicited Systemic AEs
Up to approximately 7 days postvaccination

An AE is any untoward medical occurrence in a patient or clinical study participant, temporally associated with the use of study intervention, whether or not considered related to the study intervention. A solicited AE is a predefined event that participants LAR are specifically asked about and record on their eVRC. Solicited systemic AEs include irritability, drowsiness, appetite lost, hives or welts, and fever. Percentage of participants with solicited systemic AEs will be reported.

Stage 1: Percentage of Participants With Unsolicited Systemic or Injection-Site AEs
Up to approximately 28 days postvaccination

An AE is any untoward medical occurrence in a patient or clinical study participant, temporally associated with the use of study intervention, whether or not considered related to the study intervention. An unsolicited AE is an event that is not solicited using a eVRC and that is communicated by a participant. Percentage of participants with unsolicited Systemic or Injection-Site AEs will be reported.

Stage 1: Percentage of Participants With Serious Adverse Events (SAEs)
Up to approximately 12 months postvaccination

A serious adverse event (SAE) is an AE that is life-threatening, requires or prolongs an existing hospitalization, results in persistent or significant disability or incapacity, is a congenital anomaly or birth defect, or is another important medical event deemed such by medical or scientific judgment. Percentage of participants with one or more SAEs will be reported.

Stage 1: Percentage of Participants With Medically Attended AEs (MAAEs)
Up to approximately 12 months postvaccination

A MAAE is defined as an adverse event in which medical attention is received during an unscheduled, non-routine outpatient visit, such as an emergency department visit, office visit, or an urgent care visit with any medical personnel for any reason. Percentage of participants with MAAEs will be reported.

Stage 2: Percentage of Participants With Immediate AEs Following Vaccination
Up to approximately 30 minutes after each vaccination

An AE is any untoward medical occurrence in a patient or clinical study participant, temporally associated with the use of study intervention, whether or not considered related to the study intervention. Percentage of participants with immediate AEs following vaccination will be reported.

Stage 2: Percentage of Participants With Solicited Injection-Site AEs
Up to approximately 7 days after each vaccination

An AE is any untoward medical occurrence in a patient or clinical study participant, temporally associated with the use of study intervention, whether or not considered related to the study intervention. A solicited AE is a predefined event that participants LAR are specifically asked about and record on their eVRC. Solicited injection-site AEs include redness, swelling, pain or tenderness and hard lump. Percentage of participants with solicited injection-site AEs will be reported.

Stage 2: Percentage of Participants With Solicited Systemic AEs
Up to approximately 7 days after each vaccination

An AE is any untoward medical occurrence in a patient or clinical study participant, temporally associated with the use of study intervention, whether or not considered related to the study intervention. A solicited AE is a predefined event that participants LAR are specifically asked about and record on their eVRC. Solicited systemic AEs include irritability, drowsiness, appetite lost, hives or welts, and fever. Percentage of participants with solicited systemic AEs will be recorded.

Stage 2: Percentage of Participants With Unsolicited Systemic or Injection-Site AEs
Up to approximately 28 days after each vaccination

An AE is any untoward medical occurrence in a patient or clinical study participant, temporally associated with the use of study intervention, whether or not considered related to the study intervention. An unsolicited AE is an event that is not solicited using a eVRC and that is communicated by a participant. Percentage of participants with unsolicited Systemic or Injection-Site AEs will be reported.

Stage 2: Percentage of Participants With SAEs
Up to approximately 12 months postdose 4

A SAE is an AE that is life-threatening, requires or prolongs an existing hospitalization, results in persistent or significant disability or incapacity, is a congenital anomaly or birth defect, or is another important medical event deemed such by medical or scientific judgment. Percentage of participants with one or more SAEs will be reported.

Stage 2: Percentage of Participants With MAAEs
Up to approximately 12 months postdose 4

A MAAE is defined as an adverse event in which medical attention is received during an unscheduled, non-routine outpatient visit, such as an emergency department visit, office visit, or an urgent care visit with any medical personnel for any reason. Percentage of participants with MAAEs will be reported.

Secondary Endpoints

Stage 1: Geometric Mean Concentrations (GMCs) of Serotype-Specific Immunoglobulin G (IgG)
Up to approximately 30 days post vaccination
Stage 1: Ratio of GMCs of Serotype-Specific IgG of V118C to PCV20 [V118C/PCV20]
Approximately Day 30 postvaccination
Stage 1: Geometric Mean Fold Rises (GMFRs) of Serotype-Specific Immunoglobulin G (IgG)
Day 1 (Baseline) and approximately Day 30 postvaccination
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Study Design & Arms

AllocationRANDOMIZED
MaskingDOUBLE
ModelPARALLEL
PurposePREVENTION

Treatment Arms

ArmTypeDescription
V118C (Stage 1)EXPERIMENTALParticipants will receive a single 0.5 mL intramuscular (IM) injection of V118C administered at 12 to 15 months of age.
V118C (Stage 2)EXPERIMENTALParticipants will receive a single 0.5 mL IM injection of V118C administered at 2,4,6, and 12 months of age.
PCV20 (Stage 1)ACTIVE_COMPARATORParticipants will receive a single 0.5 mL IM injection of PCV20 administered at 12 to 15 months of age.
PCV20 (Stage 2)ACTIVE_COMPARATORParticipants will receive a single 0.5 mL IM injection of PCV20 administered at 2,4,6, and 12 months of age.

Interventions

NameTypeDescription
V118C (Stage 1)BIOLOGICALIM administration of V118C
V118C (Stage 2)BIOLOGICALIM administration of V118C
PCV20 (Stage 1)BIOLOGICALIM administration of PCV20
PCV20 (Stage 2)BIOLOGICALIM administration of PCV20
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Eligibility Criteria

Age Range2 Months to 15 Months
SexALL
Healthy VolunteersYes
Study Sites15

Inclusion Criteria: The main inclusion criteria include but are not limited to the following: Stage 1: * Is previously vaccinated with 3 routine infant doses of Pneumococcal 20-valent conjugate vaccine (PCV20) * Is 12 through 15 months of age Stage 2: \- Is approximately 2 months of age Both S...

Countries:United States
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Recent Changes (Last 90 Days)

LOWOct 2, 2026NCT07300267lastUpdatePostDate: changed
LOWOct 2, 2026NCT07300267lastUpdatePostDate: changed

Frequently asked questions about V118C

What is V118C?

V118C is an investigational monoclonal antibody being developed by Merck & Company, Inc. (MRK) for the prevention of pneumococcal infection. It is currently in Phase 1 clinical development. V118C is also referred to as V118C (Stage 1).

What is V118C used for?

V118C is being studied for pneumococcal infection, an infectious disease caused by Streptococcus pneumoniae. The Phase 1 trial enrolls healthy children as young as 2 months of age in the United States, evaluating V118C in a pediatric population.

Who makes V118C?

V118C is being developed by Merck & Company, Inc., which trades under the ticker MRK. Merck is the sponsor of the Phase 1 clinical study of V118C in children.

What phase is V118C in?

V118C is in Phase 1 clinical development. It is an investigational monoclonal antibody and has not been approved by the FDA. One Phase 1 trial is currently recruiting, and no trials have been completed.

What clinical trials is V118C in?

V118C is being evaluated in the Phase 1 trial NCT07300267, titled A Clinical Study of Novel Pneumococcal Vaccine V118C in Children (V118C-002). The trial is recruiting 210 participants in the United States, is randomized, double blind, and active controlled, and enrolls healthy volunteers.

Is V118C the same as V118C (Stage 1)?

Yes, V118C (Stage 1) is an alternative name for V118C, the investigational monoclonal antibody developed by Merck & Company, Inc. (MRK) for pneumococcal infection. Both names refer to the same Phase 1 asset.